AT&T Microelectronics Inc, based in Berkeley Heights, New Jersey,says that it has the industry’s first complete Gallium Arsenide fibre optic communication chip set for digital transmission. The set comprises seven components – a $40 transimpedance amplifier, $35 automatic gain control amplifier, $60 laser driver, $50 decision circuit, plus multiplexer, demultiplexer and a clock recovery circuit – all prices for 1,000-up; the last three parts will not be available until mid 1989 and have not yet been priced. The chip set is designed to provide a single source for building a digital communication system with higher transmission capacity and more efficient operation than is possible with Silicon circuits. In combined enhancement and depletion mode field effect transistor technology, the chip set is intended for applications such as high capacity local networks, fibre optic cable repeaters, high resolution graphics displays, and high- speed test equipment. Transmission at speeds of up to 3Gbps is supported.
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